Hey I just went through this see my thread " injectors not firing"
Turned out in the end to be a bad tank of gas
The gas was clogging the injectors so they were not able to do their job
You can actually see the bottom of the injectors with a 1" mirror if you remove the upper intake
The other thing that I found hugely helpful was I bought a set of NOID lights at my local parts store they were like $12 or something like that
You can pull the plug off an injector and plug in the NOID light that fits (my set it was the one marked for a Geo)
That will tell you if the elec. signal is getting to the injector telling it to open or not
There should be 12V at one of the prongs in the injector harness with the key on
Good luck, don't do like me and just throw parts at it, figure out what the actual problem is first with some troubleshooting

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1988 Ranger STX, custom built flatbed, winch, 33x 10.5 BFG mudders
1974 Suburban (AKA "the sub") lockers front & rear, 383 cu in not even close to stock motor, snowplow 37 x 12.5 HUMMV tires, 4.56 gears
1952 M38 (CJ3) Jeep - my newest project - 289 ford, hardtop, got it with not one wire in it. Hope to have it driving this year